Connect asm and hexl buffers
hexasm.mp4
- hexl address → line number mapping
- line number → hexl address mapping
hexasm parses a listing file (output from nasm with -l) to get a map between source code lines and hex addresses e.g.
1 00000000 B041 mov al, 'A'
2 loop:
3 00000002 3C5B cmp al, 'Z' + 1
4 00000004 0F84F801 je end
5
6 ;;
7 ;; Make the system call to the BIOS video services
8 ;;
9 00000008 B40E mov ah, 0x0e
10 0000000A CD10 int 0x10 ; looks at `ah` to know which BIOS operation to perform
11
12 0000000C FEC0 inc al
13
14 0000000E EBF2 jmp loop
15
16
17 ;;
18 ;; Write enough zeros to get us to the boot sector identifier
19 ;;
20 00000010 00<rep 1EEh> times 512-2-($-$$) db 0
21
22
23 ;;
24 ;; Write 0x55aa boot sector identifier
25 ;;
26 000001FE 55AA db 0x55, 0xaa
27
28 end:
I am also experimenting with ways to make my process of OS development more interactive